Contract 0x7571CC9895D8E997853B1e0A1521eBd8481aa186 2

 

Contract Overview

Rubicon: bathWBTC Token
Balance:
0 Ether

EtherValue:
$0.00

Token:
Txn Hash Method
Index
From
To
Value
0x9344d916156b8b110bff38beb89008c8c64bf1c29f75095c6ca2f959efa50e90Withdraw135932972022-07-01 5:35:231 day 20 hrs ago0x66f5c13f4b65951b81be99fe87f406e3ea906a82 IN  Rubicon: bathWBTC Token0 Ether0.0000578015920.001
0xc7fb52306b01b4222a3865e6ae39ba2e86e759be938c3f11e2bcc37906c28741Withdraw134186882022-06-29 0:34:234 days 1 hr ago0xcd12d92bc5e76b6ee579472241e16f60a1cd18e2 IN  Rubicon: bathWBTC Token0 Ether0.0001240947950.001
0xe236de5ba04571820bb21370af38d999bfe736be20b599e4c14c28a89b93c39aDeposit128396162022-06-23 18:17:209 days 8 hrs ago0x76c3e7e40c91c59a1e8d3e388a62aadba837d757 IN  Rubicon: bathWBTC Token0 Ether00.001
0x7c095aee328b1adfb565a91aded140b04783f639cbd71924530336a0293130ecWithdraw124990112022-06-20 19:32:2412 days 6 hrs ago0x4ac4ff89b9d4b3daf54942e3df63751a4a54c735 IN  Rubicon: bathWBTC Token0 Ether0.0001145052460.001
0x54291a6fb4ed24c05b529e8ddae9c8001d803870a8fad7d598408bb78e374d80Withdraw124036442022-06-20 0:07:3213 days 2 hrs ago 0xb1e9d641249a2033c37cf1c241a01e717c2f6c76 IN  Rubicon: bathWBTC Token0 Ether0.0000687044130.001
0x0f61e4bb78b44d7d453e720b1256180664a66e2ff9b83175ab41cd9bfa769092Withdraw124030342022-06-20 0:03:0813 days 2 hrs ago 0xb1e9d641249a2033c37cf1c241a01e717c2f6c76 IN  Rubicon: bathWBTC Token0 Ether0.0000841864440.001
0x987d423da1a37354d2262fcf522ca74212fe21797faa9d528f12dcc5e48884bdWithdraw121838912022-06-18 2:23:4014 days 23 hrs ago0x6e602df9352efd1e42a65f7deecb17c5160c1f13 IN  Rubicon: bathWBTC Token0 Ether0.0000941745690.001
0xda543a0cfd019d3d61940129da843b0c20f922909dc44a989bc6710fe2532ce6Withdraw119612612022-06-15 22:38:1117 days 3 hrs ago0x4f6798d42feb2a9169f4fbe0f986d005e1b76180 IN  Rubicon: bathWBTC Token0 Ether0.000229599170.001
0xd8f65e0f28f5c6d1d30c96d2843a7ac4032454beab8f1bee5628a98372cf1b76Withdraw115718012022-06-13 13:01:0019 days 13 hrs ago0xc3c8f634b136771782616ddf42c2249fa7961b91 IN  Rubicon: bathWBTC Token0 Ether0.0003248422310.001
0xf6c6efa9e25689b1cd06dcf9ae868d86261d3a8cb3a3c5287581b866545e2b4dDeposit115717792022-06-13 13:00:4419 days 13 hrs ago0xc3c8f634b136771782616ddf42c2249fa7961b91 IN  Rubicon: bathWBTC Token0 Ether0.0003248408220.001
0x650969397a5057cab04b2750040bacb8d70445c2b7a7ff00587bbb5b4d6a11e6Withdraw115717562022-06-13 13:00:2919 days 13 hrs ago0xc3c8f634b136771782616ddf42c2249fa7961b91 IN  Rubicon: bathWBTC Token0 Ether0.0003248251310.001
0x85c40ec462bc435327e9c2299b7435e934d6b9a310145fbc024e97002145059bWithdraw114915262022-06-13 4:09:0019 days 22 hrs ago0xbf57f59d35124f071001fc9185e5169a7c44da1b IN  Rubicon: bathWBTC Token0 Ether0.000473812840.001
0x0db240ee894ee7458fc40c7a3f7d7277fb1f10d13634a3d5c9bd3af4ad86129dWithdraw114257542022-06-12 16:57:3320 days 9 hrs ago0xa00685c1e5dcc40cf6b70f254c50a81774da31dc IN  Rubicon: bathWBTC Token0 Ether0.0002273841820.001
0x33e7667399aca24221ae412c02c47a4421e082e952666cae6c677dbeb1046533Withdraw110493102022-06-09 11:20:1723 days 15 hrs ago0xe5c1cbb2717cb644b7c84cce6519c58e560ee007 IN  Rubicon: bathWBTC Token0 Ether0.0001214221470.001
0x67c8475747f249994e5ee2046742f6c4a35549da17c351dba621dcb1c61970ccWithdraw109669822022-06-08 17:12:4324 days 9 hrs ago0x3204ac6f848e05557c6c7876e09059882e07962f IN  Rubicon: bathWBTC Token0 Ether0.0001953203260.001
0xb7cfa17b50d4cf4a1d8fd5d29a710f0f6d02767a0778e510fd34a8490d13e02dDeposit107049412022-06-06 4:08:4226 days 22 hrs ago0x66f5c13f4b65951b81be99fe87f406e3ea906a82 IN  Rubicon: bathWBTC Token0 Ether0.0001393132120.001
0x08047285363cb23870806b2b8c6b2d2209f97c8ebe5a85852ea768fb16c0356cDeposit106535652022-06-05 14:36:0127 days 11 hrs ago0x6e602df9352efd1e42a65f7deecb17c5160c1f13 IN  Rubicon: bathWBTC Token0 Ether0.0003865018820.001
0x9fc6ebebd7e2e76db0d360821d57684da6ad2ac7f2d74a665fddd81f2a3422a4Withdraw103401032022-06-02 21:22:4630 days 4 hrs ago0x4d60914129c577e61d8db8e6de397f76a2c3a3f1 IN  Rubicon: bathWBTC Token0 Ether0.0002983367270.001
0x1505be3b0940f6d4bf3c009cb00d833b142722ad571a21df8062325e438a1529Withdraw100766922022-06-01 19:45:2631 days 6 hrs ago0x2373e99a976aaf015f2ce6226f6d0c1bf9e36c44 IN  Rubicon: bathWBTC Token0 Ether0.0002636182470.001
0xa54ab71bd70bc19a1fbb21ddd6113ebcfbd9f3937609f08e2835468c16ced1f0Withdraw93522412022-05-31 1:37:5433 days 43 mins ago0xc7fb491752add33e1eee4ae440db58577a14fcdc IN  Rubicon: bathWBTC Token0 Ether0.0000830016260.001
0x3f00ac485836d35d6a83e40b95004871a52f7327440ee3db0ab9e00a368f9127Deposit90022432022-05-25 23:43:4638 days 2 hrs ago0xe37af33bfd33c0d09b6d7feb0fe2247b1efa1b62 IN  Rubicon: bathWBTC Token0 Ether0.0001076137120.001
0x9cd9322cf8081f47f1cbd54d67731e8bb6137ca40a7b61b7742de1f6a62a3d1fWithdraw89996692022-05-25 22:08:2838 days 4 hrs ago0x3794089f369b27673d1a5753e28e85b82a17da6b IN  Rubicon: bathWBTC Token0 Ether0.0001790999280.001
0x7fd9ba661fa97a7086d1c6698a37c852bd1328ffc19f1c799585bc1237ca6141Upgrade To89368522022-05-24 21:53:2139 days 4 hrs ago0x3d77f824910eb37eed65eb789139805b34d73807 IN  Rubicon: bathWBTC Token0 Ether0.0001067164740.001
0x1ee95c4055b2bb6022b4cdb1a7a367ff3cf05958197489a5fbe4338487f0aaf4Withdraw88605762022-05-23 19:11:1040 days 7 hrs ago0xeca10ec99f125c92b0aa0aa5c79182a602a7a051 IN  Rubicon: bathWBTC Token0 Ether0.0001489819570.001
0xe98b667ca1821465861071733abf283badc5745630af73d882cf6a9f57680da3Deposit87222452022-05-21 11:34:4842 days 14 hrs ago0xfba38ebf53b5d3956d4e4815db9b88cc01db023b IN  Rubicon: bathWBTC Token0 Ether0.0000485881420.001
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Latest 25 internal transaction
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0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: bathWBTC Token Wrapped BTC: WBTC Token0 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: bathWBTC Token 0x4f06912118dd95da06b97eed80ba593b9e0329f30 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: Bath Pair Rubicon: bathWBTC Token0 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: bathWBTC Token Wrapped BTC: WBTC Token0 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: bathWBTC Token Rubicon: Rubicon Market0 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: bathWBTC Token Rubicon: Bath House0 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: bathWBTC Token 0x4f06912118dd95da06b97eed80ba593b9e0329f30 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: Bath Pair Rubicon: bathWBTC Token0 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: bathWBTC Token Wrapped BTC: WBTC Token0 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: bathWBTC Token Rubicon: Rubicon Market0 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: bathWBTC Token Rubicon: Bath House0 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: bathWBTC Token 0x4f06912118dd95da06b97eed80ba593b9e0329f30 Ether
0x8c923f4355fc44eb407b31c0839ead6f58013dabc05afef763192e6dd2f38db2137221062022-07-03 0:46:411 hr 35 mins ago Rubicon: Bath Pair Rubicon: bathWBTC Token0 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: bathWBTC Token Wrapped BTC: WBTC Token0 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: bathWBTC Token 0x4f06912118dd95da06b97eed80ba593b9e0329f30 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: Bath Pair Rubicon: bathWBTC Token0 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: bathWBTC Token Wrapped BTC: WBTC Token0 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: bathWBTC Token Rubicon: Rubicon Market0 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: bathWBTC Token Rubicon: Bath House0 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: bathWBTC Token 0x4f06912118dd95da06b97eed80ba593b9e0329f30 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: Bath Pair Rubicon: bathWBTC Token0 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: bathWBTC Token Wrapped BTC: WBTC Token0 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: bathWBTC Token 0x4f06912118dd95da06b97eed80ba593b9e0329f30 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: Bath Pair Rubicon: bathWBTC Token0 Ether
0x036cb6b3a57b8aade121543bdf220b593e21cb6c8dbe8fe4ea06d5ab68e88bc7137215322022-07-03 0:30:501 hr 51 mins ago Rubicon: bathWBTC Token Wrapped BTC: WBTC Token0 Ether
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x2F536756636ABf29e860717a10867860802AECe7

Contract Name:
TransparentUpgradeableProxy

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 1 runs

Other Settings:
default evmVersion, GNU GPLv3 license
/**
 *Submitted for verification at optimistic.etherscan.io on 2021-11-23
*/

pragma solidity >=0.6.0 <0.8.0;


// SPDX-License-Identifier: MIT
/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract OVMProxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        // solhint-disable-next-line no-inline-assembly
        (bool success, bytes memory returndata) = implementation.delegatecall(
            msg.data
        );

        if (success) {
            assembly {
                return(add(returndata, 0x20), mload(returndata))
            }
        } else {
            assembly {
                revert(add(returndata, 0x20), mload(returndata))
            }
        }
    }

    /**
     * @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(
            address(this).balance >= amount,
            "Address: insufficient balance"
        );

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{value: amount}("");
        require(
            success,
            "Address: unable to send value, recipient may have reverted"
        );
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data)
        internal
        returns (bytes memory)
    {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return
            functionCallWithValue(
                target,
                data,
                value,
                "Address: low-level call with value failed"
            );
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(
            address(this).balance >= value,
            "Address: insufficient balance for call"
        );
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{value: value}(
            data
        );
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data)
        internal
        view
        returns (bytes memory)
    {
        return
            functionStaticCall(
                target,
                data,
                "Address: low-level static call failed"
            );
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data)
        internal
        returns (bytes memory)
    {
        return
            functionDelegateCall(
                target,
                data,
                "Address: low-level delegate call failed"
            );
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) private pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 *
 * Upgradeability is only provided internally through {_upgradeTo}. For an externally upgradeable proxy see
 * {TransparentUpgradeableProxy}.
 */
contract UpgradeableProxy is OVMProxy {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializating the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        assert(
            _IMPLEMENTATION_SLOT ==
                bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1)
        );
        _setImplementation(_logic);
        if (_data.length > 0) {
            Address.functionDelegateCall(_logic, _data);
        }
    }

    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 private constant _IMPLEMENTATION_SLOT =
        0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
    function _implementation()
        internal
        view
        virtual
        override
        returns (address impl)
    {
        bytes32 slot = _IMPLEMENTATION_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            impl := sload(slot)
        }
    }

    /**
     * @dev Upgrades the proxy to a new implementation.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal virtual {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(
            Address.isContract(newImplementation),
            "UpgradeableProxy: new implementation is not a contract"
        );

        bytes32 slot = _IMPLEMENTATION_SLOT;

        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, newImplementation)
        }
    }
}

/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 *
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 *
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
 */
contract TransparentUpgradeableProxy is UpgradeableProxy {
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {UpgradeableProxy-constructor}.
     */
    constructor(
        address _logic,
        address admin_,
        bytes memory _data
    ) payable UpgradeableProxy(_logic, _data) {
        assert(
            _ADMIN_SLOT ==
                bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1)
        );
        _setAdmin(admin_);
    }

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the admin calls implementation()
     */
    event Implementation(address currentImplementation);

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 private constant _ADMIN_SLOT =
        0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     */
    modifier ifAdmin() {
        if (msg.sender == _admin()) {
            _;
        } else {
            _fallback();
        }
    }

    /**
     * @dev Returns the current admin.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function admin() external ifAdmin returns (address admin_) {
        admin_ = _admin();
    }

    /**
     * @dev Returns the current implementation.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function implementation()
        external
        ifAdmin
        returns (address implementation_)
    {
        implementation_ = _implementation();
        emit Implementation(implementation_);
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-changeProxyAdmin}.
     */
    function changeAdmin(address newAdmin) external virtual ifAdmin {
        require(
            newAdmin != address(0),
            "TransparentUpgradeableProxy: new admin is the zero address"
        );
        emit AdminChanged(_admin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev Upgrade the implementation of the proxy.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
     */
    function upgradeTo(address newImplementation) external virtual ifAdmin {
        _upgradeTo(newImplementation);
    }

    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data)
        external
        payable
        virtual
        ifAdmin
    {
        _upgradeTo(newImplementation);
        Address.functionDelegateCall(newImplementation, data);
    }

    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view virtual returns (address adm) {
        bytes32 slot = _ADMIN_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            adm := sload(slot)
        }
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        bytes32 slot = _ADMIN_SLOT;

        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, newAdmin)
        }
    }

    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal virtual override {
        require(
            msg.sender != _admin(),
            "TransparentUpgradeableProxy: admin cannot fallback to proxy target"
        );
        super._beforeFallback();
    }
}

Contract Security Audit

Contract ABI

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Deployed ByteCode Sourcemap

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Swarm Source

ipfs://c956bcbbc04ec373182530ed2d1b401083114462fb7c5aa0f6042a46022b8150
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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